ISSN:
1432-072X
Keywords:
Key words: Hydrogen – Hydrogenase – Nitrogenase –Gunnera– Nostoc – Symbiosis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract. Nitrogenase activity in the Gunnera Nostoc symbiosis is shown to respond dramatically to the addition of glucose. H2 can replace glucose in stimulating nitrogenase activity, but there is no H2 stimulation in the presence of excess glucose. Net hydrogen evolution is strongly stimulated by addition of glucose. We postulate that carbohydrate supply and uptake hydrogenase can moderate the apparent activity of nitrogenase by supplying reductant and/or ATP. The recycling of a large proportion of the electron flux in nitrogenase through uptake hydrogenase maintains a high level of potential nitrogenase ready to take advantage of an influx of carbohydrate.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00288957
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